diff --git a/B06_Section/B06_Section_UI_Cross_View.ts b/B06_Section/B06_Section_UI_Cross_View.ts
index 7fa0738f2..2fb647b19 100644
--- a/B06_Section/B06_Section_UI_Cross_View.ts
+++ b/B06_Section/B06_Section_UI_Cross_View.ts
@@ -321,7 +321,11 @@ export function createCrossSectionCard(
         setChipActive(null);
         onAreaSelect?.(section.station_id, null);
       }
-      if (!isSelected) onSelect(section.station_id);
+      if (!isSelected) {
+        // 첫 누름 = 이 선 — 남은 부재 고름(도수로 띠 등)이 카드 고름에 되살아나 선을 풀지 않게(295-4)
+        if (activeRevet === null) revetOffset?.select(section.chainage_m, null);
+        onSelect(section.station_id);
+      }
     }
     setLineActive(next);
   };
diff --git a/resources/tester/test_137_design_pick.py b/resources/tester/test_137_design_pick.py
index af7412b9a..fb46749b6 100644
--- a/resources/tester/test_137_design_pick.py
+++ b/resources/tester/test_137_design_pick.py
@@ -97,7 +97,7 @@ def test_카드_배선_하나만() -> None:
     """137-3 — 선을 고르면 벽 · 본체 · 면적을 풀고 카드도 고름 · 다른 고름은 선을 풂."""
     view = _src("B06_Section/B06_Section_UI_Cross_View.ts")
     assert "const pickLine = (index: number): void => {" in view
-    assert "if (!isSelected) onSelect(section.station_id);" in view
+    assert "if (activeRevet === null) revetOffset?.select(section.chainage_m, null);" in view
     assert view.count("dropLine();") >= 4  # 본체 · 벽 · 카드 풂 · 면적
     assert "setLineActive(pickedLineAt(section.station_id));" in view  # 다시 그려도 되살림
     assert "zoomBar.prepend(linePick.label);" in view  # 치수 = [+ − ⤢] 왼쪽
diff --git a/resources/tester/test_295_pick_order_detail.py b/resources/tester/test_295_pick_order_detail.py
index f69390536..4bc652b36 100644
--- a/resources/tester/test_295_pick_order_detail.py
+++ b/resources/tester/test_295_pick_order_detail.py
@@ -116,3 +116,24 @@ def test_배선():
     assert "detailHomeView(layerPoints(layer), [cx, cy], plot, homeScale, 16)" in detail
     for name in ("B06_Section_UI_Cross_View.ts", "B06_Section_UI_Cross_Detail_Select.ts"):
         assert len(_read(name).splitlines()) <= 700
+
+
+def test_보라_선_첫_누름은_그_선_295_4():
+    """안 골라진 카드의 성토 사면선 첫 누름 — 남은 부재키(도수로 띠)를 먼저 풀어 카드 고름이 되살리지 않음."""
+    proc = subprocess.run(  # noqa: S603 — 고정 실행 파일
+        ["node", os.path.join(HERE, "helper_294_7_ford_slab_pick.cjs")],
+        capture_output=True,
+        text=True,
+        encoding="utf-8",
+        timeout=60,
+    )
+    assert proc.returncode == 0, proc.stderr
+    first = json.loads(proc.stdout)["firstLine"]
+    assert first["oldKey"] == "chute"  # 옛 길 = 카드 고름이 도수로 띠 부재키를 지킴 → 선 풀림
+    assert first["newKey"] is None
+    view = " ".join(_read("B06_Section_UI_Cross_View.ts").split())
+    assert "if (!isSelected) { // 첫 누름 = 이 선" in view
+    assert (
+        "if (activeRevet === null) revetOffset?.select(section.chainage_m, null); onSelect(section.station_id);"
+        in view
+    )